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8.18 ctw Black Onyx Gemstones, Onyx Gems in Oval Cabochon Shape for Sale.
Photos are of Actual Products for Sale
8.18 ctw Black Onyx Stones, Natural Onyx in Oval Cabochon Shape for Sale Onyx Gemstones in 13 x 11 mm (calibrated) Size for Sale, Onyx Stones in Black Color

8.18ct Natural Black Onyx Gems, Oval Cut, Opaque

9.7 out of 10
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Onyx Product ID: 673177
Type: Onyx
Onyx Weight: 8.18 ct (total) Onyx 2 gems
avg. 4.09 ct
Onyx Size: 13 x 11 mm calibrated Onyx
Onyx Size: 13.1 x 11.1 x 3.5 mm Onyx
Onyx Exact Size: 13.09 x 11.11 x 3.48 mm
Length x Width x Depth
Onyx Shape: Oval Cabochon Onyx
Onyx Color: Black Onyx
Onyx Clarity: Opaque Onyx
Onyx Treatment: Dyed
Onyx Origin: Sri Lanka Onyx
Content: 2 pcs
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Product Description

These are 8.18 carat natural black Onyx gems, 2 pcs in oval shape with an exact size of 13.09 x 11.11 x 3.48 mm. These loose Onyx gemstones were mined in Sri Lanka and their clarity is Opaque.

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GemSelect Certified Store Reviews

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Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
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I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
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I am never let down by GemSelect. I love that you get the exact stone you want. Shipping is always in a few days. I have spread the word about GemSelect on social media jewelry creating groups that I attend. This sapphire is going to make one gorgeous ring

Posted By Desertchick in April, 2025
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the selection is good as are the prices

Posted By Old man in August, 2025
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I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
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Overall Rating -> 10 star ratings

Very good Hoping you will increase your inventory especially in the 6mm Thanks

Posted By Ibie in February, 2025
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